feat(mobile): create new album from add to modal

mobile/lib/presentation/widgets/action_buttons/add_action_button.widget.dart

@@ -107,7 +107,10 @@ class _AddActionButtonState extends ConsumerState<AddActionButton> {
       return;
     }
 
-    final List<Widget> slivers = [AlbumSelector(onAlbumSelected: (album) => _addCurrentAssetToAlbum(album))];
+    final List<Widget> slivers = [
+      const CreateAlbumButton(),
+      AlbumSelector(onAlbumSelected: (album) => _addCurrentAssetToAlbum(album)),
+    ];
 
     showModalBottomSheet(
       context: context,

mobile/lib/presentation/widgets/album/album_selector.widget.dart

@@ -12,8 +12,10 @@ import 'package:immich_mobile/extensions/theme_extensions.dart';
 import 'package:immich_mobile/extensions/translate_extensions.dart';
 import 'package:immich_mobile/models/albums/album_search.model.dart';
 import 'package:immich_mobile/presentation/widgets/album/album_tile.dart';
+import 'package:immich_mobile/presentation/widgets/album/new_album_name_modal.widget.dart';
 import 'package:immich_mobile/presentation/widgets/images/thumbnail.widget.dart';
 import 'package:immich_mobile/providers/infrastructure/album.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/asset_viewer/current_asset.provider.dart';
 import 'package:immich_mobile/providers/timeline/multiselect.provider.dart';
 import 'package:immich_mobile/providers/user.provider.dart';
 import 'package:immich_mobile/providers/album/album_sort_by_options.provider.dart';
@@ -766,3 +768,61 @@ class AddToAlbumHeader extends ConsumerWidget {
     );
   }
 }
+
+class CreateAlbumButton extends ConsumerWidget {
+  const CreateAlbumButton({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    Future<void> onCreateAlbum() async {
+      var albumName = await showDialog<String?>(context: context, builder: (context) => const NewAlbumNameModal());
+      if (albumName == null) return;
+      final asset = ref.read(currentAssetNotifier);
+
+      if (asset == null) {
+        ImmichToast.show(context: context, msg: "Cannot load asset information.", toastType: ToastType.error);
+        return;
+      }
+
+      final album = await ref
+          .read(remoteAlbumProvider.notifier)
+          .createAlbum(title: albumName, assetIds: [asset.remoteId!]);
+
+      if (album == null) {
+        ImmichToast.show(context: context, toastType: ToastType.error, msg: 'errors.failed_to_create_album'.tr());
+        return;
+      }
+
+      ImmichToast.show(
+        context: context,
+        msg: 'add_to_album_bottom_sheet_added'.tr(namedArgs: {'album': album.name}),
+      );
+      context.pop();
+    }
+
+    return SliverPadding(
+      padding: const EdgeInsets.symmetric(horizontal: 16),
+      sliver: SliverToBoxAdapter(
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            Text("add_to_album", style: context.textTheme.titleSmall).tr(),
+            TextButton.icon(
+              style: TextButton.styleFrom(
+                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+                minimumSize: const Size(0, 0),
+                tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+              ),
+              onPressed: onCreateAlbum,
+              icon: Icon(Icons.add, color: context.primaryColor),
+              label: Text(
+                "common_create_new_album",
+                style: TextStyle(color: context.primaryColor, fontWeight: FontWeight.bold, fontSize: 14),
+              ).tr(),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

mobile/lib/presentation/widgets/album/new_album_name_modal.widget.dart

@@ -0,0 +1,53 @@
+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
+
+class NewAlbumNameModal extends StatefulWidget {
+  const NewAlbumNameModal({super.key});
+
+  @override
+  State<NewAlbumNameModal> createState() => _NewAlbumNameModalState();
+}
+
+class _NewAlbumNameModalState extends State<NewAlbumNameModal> {
+  TextEditingController nameController = TextEditingController();
+
+  @override
+  void dispose() {
+    nameController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: const Text("album_name", style: TextStyle(fontWeight: FontWeight.bold)).tr(),
+      content: SingleChildScrollView(
+        child: TextFormField(
+          controller: nameController,
+          textCapitalization: TextCapitalization.words,
+          autofocus: true,
+          decoration: InputDecoration(hintText: 'name'.tr(), border: const OutlineInputBorder()),
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () => context.pop(null),
+          child: Text(
+            "cancel",
+            style: TextStyle(color: Colors.red[300], fontWeight: FontWeight.bold),
+          ).tr(),
+        ),
+        TextButton(
+          onPressed: () {
+            context.pop(nameController.text.trim());
+          },
+          child: Text(
+            "create_album",
+            style: TextStyle(color: context.primaryColor, fontWeight: FontWeight.bold),
+          ).tr(),
+        ),
+      ],
+    );
+  }
+}